Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Gaithersburg

Emerging Trends in Cybersecurity Is Topic of March IT Security Trainers' Conference

February 15, 2011

The National Institute of Standards and Technology (NIST) and the Federal Information Systems Security Educators' Association (FISSEA) are co-hosting FISSEA's

Basic Metrology: Alpha-Gamma Counting for High Accuracy Neutron Fluence Measurement

The Alpha-Gamma device is a totally-absorbing neutron detector that has been used to measure the absolute neutron fluence of a cold, monoenergetic neutron beam

Basic Metrology: Advancing Triple-to-Double Coincidence Ratio Liquid Scintillation Counting

The triple-to-double coincidence ratio (TDCR) method of liquid scintillation (LS) counting employs three detectors to determine experimental counting

Ecogenotoxicity Measurements of Nanoparticles

As a result of their novel properties, nanoparticles are expected to be produced and incorporated into consumer products at exponentially increasing quantities

Methods and Measurements of Nanoparticle Accumulation and Distribution in Organisms

Given the substantial differences between nanoparticles (NPs) and typical organic and inorganic environmental contaminants, new experimental methods and

Calibrations: Ionization Chambers as Secondary Standards for Activity of Radionuclides

Precise calibration of short-lived radioactive material is essential for nuclear medicine and power plant applications. To deliver such calibrations on-demand

Methods and Measurements of Nanoparticle Distribution in the Natural Environment

Given the substantial differences between nanoparticles (NPs) and typical organic and inorganic environmental contaminants, new methods and analytical

Interferometry: Quantum Error Coding in a 4-Blade Neutron Interferometer

We have designed a new type of neutron interferometer that will be less sensitive to slow vibrations. The design improves the interferometer sensitivity and

Applied: Continuous Spin-Exchange Optical Pumping in High Flux Neutron Beams

This project was a collaboration with the Insitut Laue Langevin (ILL) to study the effects of high flux neutron beams on spin-exchange optical pumping (SEOP).

Obama Administration's Budget Request for NIST Includes Critical Science and Technology Investments to Advance U.S. Innovation and Boost Economic Recovery

February 14, 2011

Washington, D.C.– Announced today, President Barack Obama's fiscal year (FY) 2012 budget submitted to Congress for the U.S. Commerce Department's National

Applied: X-ray Detection with Large Area Avalanche Photodiodes for the Neutron Radiative Decay Experiment

The radiative decay experiment measured both the branching ratio and the energy of the emitted photons that accompany neutron beta decay. Large-area avalanche

Interferometry: Neutron Interferometry with Polarized Neutrons as an Additional Degree of Freedom

The goal is to apply Quantum Information Processing techniques to improve the performance of perfect-crystal neutron interferometers by making the final

Biomarkers & Personalized Medicine Research and Diagnostics

Fri, Feb 25 2011

SomaLogic is working to find biomarkers for human disease (in blood or other matrices) and to quantify thousands of

Applied: Wide-Angle Neutron Polarization Analysis

The capabilities of many neutron scattering instruments are greatly enhanced by neutron polarization analyzers that can cover a wide angular range. This project

Webinar - Internal Auditing Best Practices

Thu, May 3 2012

This 2 hour webinar will consider internal auditing techniques and best practices that are used by a metrology

Fundamental Physics: Magnetically Trapped Neutron Lifetime Experiment

The decay of the free neutron is the simplest nuclear beta decay and is the prototype for all charged current semi-leptonic weak interactions. The decay

Fundamental Physics: Measurement of the Electron-Antineutrino Correlation in Neutron Decay (aCORN)

The angular correlation between the beta electron and antineutrino in nuclear beta decay, referred to as the “little a” coefficient, is the least well-known of

Calibrations: Californium Neutron Irradiation Facility

NIST maintains the Californium Neutron irradiation Facility (CNIF), which is an exposure facility providing fast neutrons for irradiations requiring high

Imaging: Advanced Neutron Imaging Facility

The NIST Neutron Imaging Facility (NNIF) at the NIST Center for Neutron Research .

Accelerator Facilities

The Radiation Physics Division's accelerator facilities continue to support a broad range of research efforts in the areas of industrial and medical dosimetry

Precious Metals Conversion Information

The Office of Weights and Measures (OWM) has prepared a Conversion Factors for Precious Metal Sales chart [ PDF] to assist consumers and...

Basic Metrology (Archive): Primary Radioactivity Standardization of Ni-63

Ni-63 is of considerable interest and importance in radionuclidic metrology as well as for radiation protection surveillance around nuclear facilities.

Fundamental Physics: Measurement of the Neutron Magnetic Dipole Moment Using Schwinger Scattering

We measured the neutron interaction with an atomic field (also known as Schwinger scattering) inside a silicon crystal in order to determine the value of the

NIST's Manufacturing Lab Prints 2005 Program Guide

July 26, 2005

With a value-added contribution of $1.4 trillion, U.S. manufacturing directly accounts for approximately 13 percent of the U.S. gross domestic product. The

Draft Guidelines Released for IT Security Controls

July 26, 2005

To help federal agencies comply with the Federal Information Security Management Act (FISMA) of 2002, the National Institute of Standards and Technology (NIST)

Measurement Challenges In Detecting Cancer Biomarkers

July 26, 2005

In cancer research, biomarkers are molecules that indicate the presence of cancer in the body. Most are based on abnormal changes or mutations in genes, RNA

Fundamental Physics: Search for Time Reversal Violation in Polarized Neutron Decay (emiT)

The "emiT" experiment searched for time-reversal symmetry violation term in neutron beta decay. It did so by measuring electron-proton coincidence events from

Fundamental Physics: Experiments with a Precision Neutron Polarimeter

The Neutron Spin Rotation (NSR) collaboration has developed a neutron spin polarimeter that has allowed the precise measurement of spin rotations at a level of

Fundamental Physics: Precision Measurement of the Branching Ratio and Energy Spectrum of Radiative Neutron Decay

Neutron beta-decay is typically considered as a three-body process, but it is always accompanied by inner-bremsstrahlung soft photons, n → e − + p + ν e + γ

Transmission electron micrograph of gold nanoparticles clustering in solution.

NIST Technique Controls Sizes of Nanoparticle Clusters for EHS Studies

February 2, 2011

The same properties that make engineered nanoparticles attractive for numerous applications—small as a virus, biologically and environmentally stabile, and